This paper examines the philosophical position adopted by the Tibetan Buddhist scholar Phya pa Chos kyi seng ge (1109-1169) within a fourfold set defined by the options idealism vs.realism and representationalism vs.non-representationalism.These represent positions pertaining to the conventional level in a Madhyamaka framework.Based on parallel discussions on this topic in four of Phya pas works (his doxography,his Summary of Madhyamaka,his Summary of Epistemology and his commentary on Dharmakīrtis Pramā(n)avini（s）caya),I examine Phya pas arguments against three of these views and the tenets involved in the view he himself adopts,non-representational extal realism.I discuss to what extent the later description of Phya pas view in terms of Vaibhā(s)ika-Madhyamaka is substantiated,and the problems raised by the adoption of such a view in the framework of the exegesis of Dharmakīrtis epistemology.In the appendices,I provide an edition and an English translation of the relevant passages from the four texts co(ns)idered.